The Fountain Valley Police Department Detective Bureau is commanded by the Detective Bureau Lieutenant and consists of; General Investigations, Crime Suppression Unit, Crime Analysis and Crime Scene Investigations.
General Investigations is staffed by one sergeant and five detectives assigned to conduct secondary investigations involving crimes against a person, property crimes, fraud, or sex crimes.
The Crime Suppression Unit (CSU) is staffed by one sergeant and three detectives. CSU responsibilities include crime fighting strategies that focus on repeat offenders, impacting emerging crime trends, narcotics enforcement, vice and massage operations, and gang and graffiti crimes.